Blank base, base for supporting IBT boxes and boxes in opposing formwork in conjunction with support spars, can be combined via snap-in connection, if fitting the blank base using nails, magnet, adhesive, the fixing points must be plastered subsequently, for fitting: 1. The U 71 boxes in opposing formwork, at a 71 mm spacing. Can also be combined with interconnecting frame for extreme loading. 2. The mounting boxes K3 EK and K4 EK with opposing shuttering with 2 or 4 sockets and 3 support spars each in the corners
height 25 mm for nail fixing
